X-ray system



H. D. GARRETSON.

X-RAY SYSTEM. APPLICATION FILED FEB. 5, 1921.

1,431, Patented 00. 10,1922.

Patented @ct. llU, llHZZ.

HARRY D. GARRIETSON, OF NEW YORK, N. Y.

K-RAY SYSTEM.

'Annlication tiled February 5, 1921 To all whom it may comern Be itknown that I, HARRY D. GAunFrrsoN, a citizen of the United States, and aresldent of the city, county, and State of New York, have invented a newand useful Improvement in X-Ba Systems, of which the following is aspeci cation.

The object of my invent on is to provide a system of this type in whlchunder no circumstances can there be any exposed wires of high potentialwith which a person may come in contact.

Heretofore it has been common to make the tube of an X-ray system sothat it may have a convenient location and then the body of a person isadjusted with regard to the tube for the purposes of observation,examination'or other application of X-rays. The disadvantage of such asystem is that the transformer and tube are moved relatively to eachother so that high tension wires exist with which the patient may comein contact. My invention obviates this danger by keeping the step-uptransformer and tube in fixed relation and then shifting them togetherinto any desired position for the purposes of observation, examinationor other uses of X- rays.

For a more particular description of my invention, reference is to behad to the accom panying drawings, forming a part hereof in which-Figure 1 is a plan view of a structure embodying my invention.

Figure 2 is a side elevation of the Figure 3 is a wiring diagram.

'lhroughout the various views of the drawings, similar referencecharacters designate similar parts.

In the embodiment of my invention herein shown, a practical applicationto dentistry is suggested, but it is to be understood that thisinvention is not limited'to dental re quirements but may be usedwherever desired.

In this particular embodiment an X-ray tube 1 is mounted in a suitablecasing 2 which may be of metal and an insulating material such as hardrubber, and this casing 2 is made of any suitable shape and given a tubular projection 8 through which X-rays may be projected and this casing 2also containsand completely encloses a step-up transformer 4 with leadin wires 5 and three wires 6 which run from the transformer to the tube1.

Serial No. 442,609.

The casing 2, at each end, is provided with guides 7 which are fixedthereto and provided with rollers 8 which take on the under side ofcurved rack bars 9 which have their upper arms fixed to a crotch 10which is pivoted at 11 to a bracket 12 which is given any suitablesupport. Each' guide 7 carries a pinion 13 which is fixed to a commonshaft lftand meshes with the racks on the bars 9, as indicated, and oneof these pinions is fixed to a worm gear 15 which meshes with a worm 16carried by a shaft 17 which is journaled in one of the guides 7 and thisshaft may be turned by means of a hand crank 18 so that by turning thehand crank, the entire casing 2 and its contents may be placed in anydesired position. I

It is apparent from the foregoing that the only wires which run -fromthe casing 2 are the wires 5 which are low tension wires and not of adangerous kind.

In view of the foregoing the operation of my improved system will bereadily understood. Assuming that the patient is in position and readyfor the operation of the X-rays the casing 2 is adjusted by shifting thecrotch 10 on the pivot 11 and by turnmg the handle 18 until the correctposition for an exposure has been found; an alternating current is thenturned on through the wires 5 and the transformer 4 then raises thevoltage to the required amount and causes the correct kind of an X-raycurrent to be passed through in the tube 1. After the desired exposurehas been had the apparatus may be shifted to any desired location byturning the handle 18 and if necessary by shifting the crotch 10 on thepivot 11. From this it is obvious that the casing 2 maybe so placed thatany desired exposure may be had and that at no time, under anyconditions, is the patient or the operator exposed to high potentialwires or to the danger of contact with high potential wires of theapparatus and it is adjusted to suit the patient and the patient is notadjusted to suit the apparatus.

While I have shown and described one embodiment of my invention, it isobvious that it is not restricted thereto, but that it is broad enoughto cover all structures that come within the scope of the annexed claim.

Having thus described my invention, what I claim is;

In a system of the class described, an X-ray tube, a transformeradjacent to and in mg the apparatus are free from all danger of contactwith high potential parts of the 10 apparatus and it may be positionedto throw -rays on any desired part of the patient Without shifting him.

In testimony whereof, I have hereunto set my hand this 31st day ofJanuary, 1921.

HARRY D. GARRETSON.

